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      带连接的 Codeigniter 活动记录更新

      Codeigniter active record update with join(带连接的 Codeigniter 活动记录更新)
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              1. 本文介绍了带连接的 Codeigniter 活动记录更新的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                问题描述

                我有两张桌子:

                table1:id、user_id、poll_id、options_id

                table2: id, poll_id, votes

                column votes 是一个整数,我想通过使用一些 where 子句加入表来更改值:

                $this->db->set('votes', 'votes - 1', FALSE)->join('table1', 'poll_votes.options_id = table2.id')->where('poll_id', $row)->where('user_id', $id)->更新('table2');

                我收到此错误:

                <上一页>错误号:1054'where 子句'中的未知列'user_id'更新 `table2` SET votes = votes - 1 WHERE `poll_id` = '9' AND `user_id` = '1'

                解决方案

                试试这个:

                $this->db->set('votes', 'votes - 1', FALSE)$this->db->where('table1.user_id',$id);$this->db->where('table2.poll_id',$row);$this->db->update('table1 join table2 ON table1.poll_id=table2.poll_id');

                i have two tables:

                table1: id, user_id, poll_id, options_id

                table2: id, poll_id, votes

                column votes is an integer and i want to change the value by joining the tables with some where clauses:

                $this->db
                ->set('votes', 'votes - 1', FALSE)
                ->join('table1', 'poll_votes.options_id = table2.id')
                ->where('poll_id', $row)
                ->where('user_id', $id)
                ->update('table2');
                

                Im getting this error:

                Error Number: 1054
                Unknown column 'user_id' in 'where clause'
                UPDATE `table2` SET votes = votes - 1 WHERE `poll_id` = '9' AND `user_id` = '1'
                

                解决方案

                Try this one:

                $this->db->set('votes', 'votes - 1', FALSE)
                $this->db->where('table1.user_id',$id);
                $this->db->where('table2.poll_id',$row);
                $this->db->update('table1 join table2 ON table1.poll_id= table2.poll_id');
                

                这篇关于带连接的 Codeigniter 活动记录更新的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

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